5-3
5-1 Protective Functions and Troubleshooting
5
Maintenance Operations
External
trip
If an error occurs in the external
equipment or devices, the Inverter
receives an input signal, then the
drives output is shut off.
(Available with the external trip
function selected)
E12.0
Has any error occurred in the external
devices when the external trip function is
selected?
(Correct the external device error.)
4-84
USP trip
Appears when the power is turned
on with the RUN signal input into the
Inverter.
(Available with the USP function
selected)
E13.0
When the USP function was selected, did
you turn on the power with the RUN
signal input into the Inverter? (Cancel the
RUN command and turn on the power.)
4-84
Ground
fault trip
*1
Protects the Inverter if a ground fault
between the Inverter output unit and
the motor is detected when turning
on the power.
(This function does not work when
there is residual voltage in the
motor.)
E14.0
Is there any ground fault? (Check the
output wires and motor.)
Is there any error in the Inverter itself?
(Disconnect the output wires to check.)
Is there any error in the main circuit?
(Check the main circuit. Refer to Chapter
6.) (Repair/Replace)
Incoming
overvoltage
trip
Appears if the incoming voltage
continues to be higher than the
specification value for 100 seconds
while the Inverter is stopped.
Trips when the main circuit DC
voltage reaches approximately 390
V DC for 200-V class, and 780 V DC
for 400-V class.
E15.0
Is the incoming supply voltage too high
while the Inverter is stopped?
(Lower the incoming voltage, correct the
power supply fluctuation. Fit an AC
reactor to power supply input if needed.)
Momentary
power
interruption
trip
Shuts off the output when a
momentary power interruption
occurs for 15 ms or more.
If the shutoff time is long, it is
normally recognized as a power
shutoff. Note that, when restart is
selected, the Inverter restarts at
power-on as long as the RUN
command remains.
E16.0
Has the incoming power supply voltage
dropped?
(Power recovery)
Is there a contact failure for MCCB and/or
Mg?
(Replace MCCB, Mg.)
4-60
Tempera-
ture error
when the
rotation
speed of
the cooling
fan
decreases
Appears if a decrease of the cooling
fan rotation speed has been
detected when a temperature error
occurs.
E20.0
Has the cooling efficiency been reduced?
(Replace the cooling fan.)
Is there any clogging in the heatsink fin?
(Clean the fin.)
Tempera-
ture error
Shuts off the output if the
temperature has risen in the main
circuit because of the high ambient
temperature.
E21.0
Have you installed the Inverter vertically?
(Installation check)
Is the ambient temperature high?
(Decrease the ambient temperature.)
Gate array
communi-
cations
error
Trips when a fault is detected in
communication behavior between
the built-in CPU and the gate array.
E23.0
Is there any large electrical noise source
around?
(Countermeasures against electrical
noise)
Has any internal cable been
disconnected?
(Check the connector.)
Name Description Error Code Check point and remedy
Reference
page
*1. The reset command through the RS terminal or STOP/RESET key is not accepted. Turn off the power.
*2. The reset operation via the Digital Operator is not accepted. Be sure to reset via the RS terminal.
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